Genetics Slides

Genetics Final Summer 2025

By Rylend Young

​Linkage

​You want to determine the distance of the E, G, and N genes in eels. You cross an eel with an EGN phenotype that is heterozygous at each loci with a test-cross eel. You recover the following progeny.

1269 egN
7 EgN
252 EGN
612 Egn
3 eGn
628 eGN
238 egn
1350 EGn

Open Ended

Are the genes linked? How do you know?

Fill in the Blanks

Write the genotype of the eel that is heterozygous at each loci.

Open Ended

Describe Imprinting